My experience mirrors Lisa's. I'm not fat, but I don't have the thinnest thighs. Some shorts, regardless of length, just looked better on me than others. I must have tried six or seven of them before I settled on my favorite, the RS short by Sugoi. They cost a lot but they're worth it. I tend to like the higher end shorts because the material seems to "lock and load" better.
TE has a generous return policy. Just make sure you try the shorts on over undies first.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher